"test" vs. "testing" in the database.yml

Why is it "test" instead of "testing" in the database.yml? It seems to me pretty plain that it should be "testing" in order to remain consistent with the other 2: development and production. E.g. you could think about it as development phase, testing phase, production phase vs. develop, test, and, well, produce doesn't really make sense but that's irrelevant.

Reason I ask is cus I encountered an "adapter not specified" when trying to run rspec after switching to postgresql and hence modifying my database.yml file and the problem was that I unthinkingly wrote "testing" instead of "test".